Container opening



FIG. 1 is a top view of a container opening showing my new design;

FIG. 2 is a front view of the container opening;

FIG. 3 is a perspective view of the container opening; and,

FIG. 4 is a front elevational view of the container opening shown in the surface of a carton blank. 

The ornamental design for a container opening, as shown and described. 